172306331 has 8 divisors (see below), whose sum is σ = 174326880. Its totient is φ = 170292672.

The previous prime is 172306327. The next prime is 172306349. The reversal of 172306331 is 133603271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172306331 - 2² = 172306327 is a prime.

It is a super-2 number, since 2×172306331² = 59378943405363122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172306331.

It is not an unprimeable number, because it can be changed into a prime (172306391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61775 + ... + 64503.

It is an arithmetic number, because the mean of its divisors is an integer number (21790860).

Almost surely, 2^172306331 is an apocalyptic number.

172306331 is a deficient number, since it is larger than the sum of its proper divisors (2020549).

172306331 is a wasteful number, since it uses less digits than its factorization.

172306331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 172306331 is about 13126.5506131657. The cubic root of 172306331 is about 556.4597354776.

The spelling of 172306331 in words is "one hundred seventy-two million, three hundred six thousand, three hundred thirty-one".